FIELD OF THE INVENTION
[0001] The present disclosure is concerned with oral irrigators and in particular with oral
irrigators having a first and a second switch element.
BACKGROUND OF THE INVENTION
[0002] It is generally known that an oral irrigator might have two switch elements, namely
a first switch element that switches on the oral irrigator so that the oral irrigator
emits a continuous or pulsed water jet that can be directed in particular to the interdental
areas of a user's dentition to clean these areas from debris by the water jet. A second
switch element may be present that can be used to modify a parameter of the water
jet such as the intensity of the water jet.
[0003] There is a general demand for improvements of oral irrigators, in particular improvements
relating to the usage of the oral irrigator.
SUMMARY OF THE INVENTION
[0004] In according with an aspect an oral irrigator is provided having a first liquid container,
an nozzle outlet, a pump driven by a drive to pump liquid from the liquid container
to the nozzle outlet so that a liquid jet is emitted via the nozzle outlet, a first
switch element arranged so that the drive is powered when the first switch element
is actuated once and the oral irrigator is switched into an ON state and so that powering
of the drive is stopped and the oral irrigator is switched into an OFF state when
the first switch element is actuated once again, and a second switch element arranged
so that the drive is powered only while the second switch element is continuously
actuated by the user and powering is stopped when the second switch element is released.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] The present disclosure will be further elucidated by figures and a detailed description
relating to the figures. In the figures
- Fig. 1A
- is a front view of an example oral irrigator in accordance with the present disclosure;
- Fig. 1B
- is a side view of the oral irrigator shown in Fig. 1A; and
- Fig. 2
- is a cross-sectional view of the oral irrigator shown in Figs. 1A and 1B.
DETAILED DESCRIPTION OF THE INVENTION
[0006] An oral irrigator in accordance with the present disclosure has two switching elements
that control the emission of a liquid jet. A first switching element is provided that
is arranged to control the emission of the liquid jet by consecutive actuation of
the first switching element. If the oral irrigator is assumed to be in an OFF state,
then actuating the first switching element once leads to a powering of a drive of
the oral irrigator, which drive actuates a pump that pumps liquid from a liquid reservoir
through liquid channels to a nozzle outlet, where the liquid jet is emitted (in short,
a driven pump is actuated). The oral irrigator is then in an ON state and continuously
emits the liquid jet (where the jet may be a continuous or a pulsed jet). The first
switching element is only actuated once and the user can then move the actuating finger
into another, potentially more comfortable position. In order to stop the powering
of the drive (or driven pump), the user has to actuate the first switching element
once again. The oral irrigator is then set into the OFF state again.
[0007] To allow the user a different and potentially faster control of the water jet, the
oral irrigator has a second switch element that only powers the drive to emit the
liquid jet while the user continuously actuates the second switch element (i.e. while
the user pushes or triggers the second switch element). Thus, the user must always
push or trigger the second switch element to emit the liquid jet. When the user wants
to switch from one interdental area to the next, the user may release the second switch
element for a short time. Once the second switch element is released, the oral irrigator
is set into an OFF state and back into the ON state when the user continues to actuate
the second switch element when, e.g., the nozzle outlet was moved into its new position.
The second switch element thus allows a different way of operating the oral irrigator
and the user can choose which way of operating is better suited for the user's preferences
of the current irrigation activity.
[0008] The first and/or second switch element may be realized as an electro-mechanical switch
element such a push-button or as a touch switch element such as a capacitive switch.
All usual realizations of switch elements known by a skilled person shall be encompassed.
[0009] In some embodiments, a visual indicator is incorporated only into the first switch
element, which visual indicator is arranged to indicate that the oral irrigator is
in an ON mode. This may be done by a first color, e.g. a green color. The visual indicator
may switch to another color, e.g. a red color, when the liquid level in the liquid
reservoir has dropped below a threshold level. Instead of changing the color, the
visual indicator may start to flash once the liquid drops to the threshold level.
As the first switching element needs only to be shortly pushed to switch the oral
irrigator into the ON mode, the first switch element is a good choice for incorporation
of the visual indicator. Of course, additionally or alternatively, a visual indicator
may be a arranged on the outside of the handle of the oral irrigator.
[0010] In some embodiments, the user can override the emission of the liquid stream in the
ON state by actuating the second switch element so that the water jet is then stopped
(i.e. the powering of the drive or driven pump is stopped) when the second switch
element is released.
[0011] In some embodiments, the ON state is automatically ended after a preselected time
period, which preselected time period may lie in the range of between 1 sec and 600
sec, in particular in a range of between 10 sec and 240 sec, further particular in
a range of between 20 sec and 120 sec. Additionally or alternately, the ON state may
be automatically ended when the liquid level in the liquid container has dropped to
a first threshold level.
[0012] In some embodiments relating to the previous paragraph, at least one of the first
or second switch elements (or another switch element) is arranged to prolong the preselected
time period after which the oral irrigator automatically switches from the ON state
into the OFF state when the respective switch element is actuated within a preselected
control time period after the first switch element was actuated so that the oral irrigator
is in the ON state. The prolongation may be a doubling of the preselected time period.
A further prolongation may be possible if the respective switch element is actuated
a third or even further times within the preselected control time period. Each single
actuation may then lead to a prolongation by adding again the preselected time period.
E.g. the preselected time period may be 10 seconds, then a first prolongation will
mean a 20 seconds period and a second prolongation will mean a 30 seconds period.
Of course, the prolongation period may be predetermined but different to the preselected
time period. E.g. the preselected time period may be 15 seconds, but each prolongation
may add further 5 seconds or a first prolongation may add 10 seconds and a third prolongation
may add 5 seconds.
[0013] In some embodiments, the oral irrigator comprises an air pump that is arranged to
pump air into the liquid stream pumped by the liquid pump through the liquid channel
towards the nozzle outlet. In such embodiments, the actuation of the first switch
element that brings the oral irrigator into the ON state may also start powering the
air pump. In embodiments, where the actuation of the second switch element overrides
the first switch element and where an air pump is present, the actuation of the second
switch element may lead to stopping the power to the air pump. This allows a user
to also control a parameter of the liquid jet that is emitted. The liquid jet without
air will be experienced by the user as having a somewhat higher intensity or harshness
on the gums.
[0014] In some embodiments, the oral irrigator has at least one mode switch element allowing
a user to change a mode of the liquid jet emission. E.g. the mode switch element may
allow the user to switch between provision of a continuous liquid jet and emission
of a pulsed liquid jet. Alternatively or additionally, the mode switch element may
allow the user to switch between at least two different intensities of the liquid
jet emission. The same mode switch element or another mode switch element may allow
for changing a different parameter of the jet emission than the intensity, e.g. the
length of liquid jet pulses or the percentage of air mixed into the liquid jet etc.
The oral irrigator may comprise at least one indicator, in particular visual indicator,
for indicating the chosen mode. In some embodiments, the mode switch element may be
arranged so that the mode can be changed while the oral irrigator is in its OFF state.
This allows the user to switch mode prior to starting the oral irrigator. As already
indicated, at least two or more mode switch elements may be present allowing the control
of various liquid jet properties in parallel (e.g. one mode switch element may switch
on and off an air pump and a second switch element may switch between at least two
liquid jet intensity levels).
[0015] In embodiments with a mode switch element and at least one visual indicator to indicate
the chosen mode, the mode switch element may be arranged so that the currently selected
mode is indicated by the visual indicator when the mode switch element is actuated
the first time in the OFF state of the oral irrigator and the next actuation would
then change the mode.
[0016] In some embodiments, the first and the second switch elements are arranged on the
outer side of the oral irrigator with a center-to-center distance of less than about
4 cm, which allows the user to comfortably switch from one type of operation to another.
In some embodiments with an additional mode switch element, the mode switch element
is arranged on the outside of the oral irrigator with a center to center distance
to the closest one of the first and second switch elements of at least 6 cm, so that
a user cannot easily mix up the different switch elements while using the oral irrigator.
[0017] While the switch elements may be arranged to directly establish an electric contact
when actuated and thus start to power the drive or the air pump, the switch elements
may be coupled to a control unit that is arranged to power the drive and/or air pump
in accordance with the present description.
[0018] Figs. 1A and 1B show two views of an example oral irrigator 1 in accordance with
the present disclosure. The oral irrigator 1 has a replaceable nozzle attachment 10
and a handle 20. The replaceable nozzle attachment comprises a housing 19 and a nozzle
11 having a nozzle outlet 12. The handle 20 has a housing 29 and further a first switch
element 21, a second switch element 22, and a mode switch element 23, which latter
mode switch element 23 is considered optional. An optional visual indicator 210 is
incorporated into the first switch element 21 and is arranged to be active (i.e. illuminated)
when the oral irrigator 1 is in an ON state. One or several visual indicators 230
may be arranged at the oral irrigator 1 to indicate the selected mode. In Fig. 1B
the oral irrigator comprises a liquid reservoir 25. This is considered as one example
realization to include a liquid reservoir into the handle of the oral irrigator, but
the liquid reservoir may also be a separate container or may be incorporated into
a base station. The separate liquid reservoir may then be connected with a handle
of the oral irrigator by means of a hose through which the liquid can be pumped.
[0019] The first switch element 21 and the second switch element 22 may be arranged on the
outer side of the oral irrigator with a center-to-center distance A1 of less than
about 4 cm, in particular less than about 3 cm. The mode switch element 23 may be
arranged on the outside of the oral irrigator with a center-to-center distance A2
to the closest first or second switch element of more than about 4 cm, in particular
of more than about 5 cm, further in particular of more than about 6 cm. The selection
of a mode may be allowed while the oral irrigator is in the ON state. E.g. the mode
switch element may be arranged to switch from liquid jet emission as a continuous
stream into a pulsed mode. Additionally or alternatively, the mode switch button 23
may be arranged to switch between liquid jet with air mixed into the liquid stream
to liquid jet emission without air mixed into the stream. Further mode switch elements
may be provided to allow independent control of different liquid jet parameters such
as pulsed vs. continuous, air mixture vs. no air mixture, intensity, pulse length
etc. But the mode switch element may also be arranged to allow the selection of the
mode while the oral irrigator is in the OFF state (and in some embodiments, the mode
selection may be only enabled while the oral irrigator 1 is in the OFF state but not
when the oral irrigator 1 is in the ON state - the mode switch element may be arranged
to have a different function in the ON state, e.g. it may be arranged to prolong a
predetermined time period during which the oral irrigator emits a water jet while
being in the ON state). The mode switch element 23 may be arranged so that the previously
selected mode is indicated once the mode switch element 23 is pushed or triggered
the first time. A pre-selected mode-selection time period may be decisive for whether
the mode switch element 23 is pushed the first time or a second time - e.g. the pre-selected
mode-selection time period may be in a range of between 0 seconds and 20 seconds,
in particular in a range of between 0.5 seconds and 10 seconds, further in particular
in a range of between 1 second and 8 seconds. If the mode switch element 23 is then
pushed a second time, the next available mode is selected. The mode switch element
23 may allow to switch between at least two modes, in particular at least three modes.
[0020] It is schematically indicated in Fig. 1B that the switch elements 21, 22, and 23
may be coupled with a control unit 40 which is also coupled with a drive 50 for driving
a pump.
[0021] Fig. 2 is a cross-sectional image of the oral irrigator 1 shown in Figs. 1A and 1B,
where also a charger 30 is shown arranged for wireless charging of a rechargeable
energy storage 26 of the oral irrigator 1. A drive 27 comprises a DC motor 270 (powered
by the rechargeable energy storage 26) having a rotating output shaft that is connected
via a gear 271 to a connecting rod 272 that drives a piston 273 of a pump 275. Instead
of a DC motor 270 the drive 27 may comprise any other known source for driving the
pump, e.g. a linear motor. The oral irrigator 1 comprises an air pump 28 for selectively
pumping air into the liquid. Instead of a rechargeable energy storage 26, an in particular
replaceable battery may be used as energy storage or the oral irrigator is powered
via a mains cable or via an external power supply.
[0022] The liquid reservoir 25 comprises an inner cavity 250 for storing a liquid such as
plain water or a mouth rinse and a hose 251 arranged in the inner cavity 251 so that
in operation the pump 275 pumps liquid from the liquid reservoir 25 through a channel
252 in the hose 251 via the pump chamber into a channel 13 of the nozzle attachment
10 so that a liquid jet is emitted via the nozzle outlet 12. Instead of a single liquid
reservoir, two or more liquid reservoirs may be present and the supply of the one
or other liquid may be controllable, e.g. by a respective switch element or in a given
mode, the two or more different liquids may be mixed together with a given mixing
ratio or the two or more liquids may be sequentially provided in accordance with a
given sequence description.
[0023] A user can operate the oral irrigator in two different ways. In the first way, the
oral irrigator 1 is in an OFF state (i.e. the drive is not powered and liquid is not
ejected) and the user then actuates the first switch element 21 by a short push or
triggering action. The oral irrigator 1 is then switched into an ON state and the
drive 27 is powered so that the pump 275 is driven into a pumping action that pumps
the liquid from the liquid reservoir 25 to the nozzle outlet 12 so that a liquid jet
is emitted. The operation of the oral irrigator 1 in accordance with the first way
may include powering of the air pump 28 as well, but alternately a further switch
may be arranged for selective ON/OFF switching of the air pump 28. When the user actuates
the first switching element 21 again by a further short push or triggering action,
then the oral irrigator 1 is switched into the OFF state again and powering of the
drive 27 is stopped. In the second way, the oral irrigator 1 is in the OFF state and
the user actuates the second switch element 22, but instead of just pushing it shorty
to switch the oral irrigator 1 into the ON state, the user has to constantly push
or trigger the second switch element 22 in order to maintain the powering of the drive
27 and thus to maintain the emission of the liquid jet. Once the second switch element
22 is released, the powering of the drive 27 is stopped and thus the emission of the
liquid jet is stopped.
[0024] The oral irrigator 1 may be arranged so that the ON state is automatically interrupted
and the oral irrigator 1 is switched into the OFF state after a preselected time period.
[0025] In case that the oral irrigator 1 is in the ON state after the user had pushed the
first switch element 21 and the user then actuates the second switch element 22, the
actuation of the second switch element may override the first switch element 21. Instead
of ignoring that the user has actuated the second switch element 22 while the oral
irrigator emits the liquid jet in an ON state initiated by the first switch element,
the actuation of the second switch element 22 brings the oral irrigator 1 into the
second way of operation, i.e. the powering of the drive 27 will then be stopped once
the second switch element 22 is released. Alternatively, actuation of the second switch
element 22 while the oral irrigator 1 is in an ON state initiated by the first switching
element 21 may be ignored and the oral irrigator 1 further emits the water jet until
the first switch element is again actuated or until a preselected time period has
passed.
[0026] The dimensions and values disclosed herein are not to be understood as being strictly
limited to the exact numerical values recited. Instead, unless otherwise specified,
each such dimension is intended to mean both the recited value and a functionally
equivalent range surrounding that value. For example, a dimension disclosed as "40
mm" is intended to mean "about 40 mm."
1. An oral irrigator comprising
a first liquid container;
an nozzle outlet;
a pump driven by a drive to pump liquid from the liquid container to the nozzle outlet
so that a liquid jet is emitted via the nozzle outlet;
a first switch element arranged so that the drive is powered when the first switch
element is actuated once and the oral irrigator is switched into an ON state and so
that powering of the drive is stopped and the oral irrigator is switched into an OFF
state when the first switch element is actuated once again; and
a second switch element arranged so that the drive is powered only while the second
switch element is continuously actuated by the user and powering is stopped when the
second switch element is released.
2. The oral irrigator in accordance with claim 1, wherein the second switch element is
arranged to override the first switch element when the oral irrigator is in the ON
state prior to actuation of the second switch element so that powering of the drive
is stopped when the second switch element is released.
3. The oral irrigator in accordance with claim 1 or claim 2, further comprising an air
pump arranged for pumping air into the liquid before the liquid exits the oral irrigator
via the nozzle outlet as a liquid jet, wherein the first switch element is arranged
so that the air pump is powered when the oral irrigator is switched into the ON state.
4. The oral irrigator in accordance with claim 3, wherein the second switch element is
arranged so that the air pump is stopped when the second switch element is actuated
to override the first switch element.
5. The oral irrigator in accordance with any one of claims 1 to 4, wherein the oral irrigator
is arranged to automatically switch from the ON state into the OFF state after a preselected
time period.
6. The oral irrigator in accordance with claim 5, wherein one of the first switch element
or second switch element is arranged to prolong the preselected time period by a preselected
prolongation time period if the switch element is actuated within a preselected control
time period after the first switch element is actuated to switch the oral irrigator
into the ON state.
7. The oral irrigator in accordance with any one of claims 1 to 6, wherein the first
switch element and the second switch element are arranged on the outer side of the
oral irrigator with a center-to-center distance of less than about 4 cm.
8. The oral irrigator in accordance with any one of claims 1 to 7, wherein a visual indicator
is only incorporated into the first switch element to indicate that the oral indicator
is in the ON state.
9. The oral irrigator in accordance with any one of claims 1 to 8, wherein the oral irrigator
comprises a mode switch element arranged to switch between different modes of operation
of the liquid jet emission.
10. The oral irrigator in accordance with claim 9, wherein the mode of operation can be
selected with the mode switch element while the oral irrigator is in the OFF state.
11. The oral irrigator in accordance with any one of claims 9 to 10, further comprising
an indicator element for indicating the selected mode.
12. The oral irrigator in accordance with any one of claims 9 to 11, wherein the mode
switch element is arranged so that the previously selected mode is indicated when
the mode switch element is actuated once and so that the mode is switched when the
mode switch element is actuated a once again.
13. The oral irrigator in accordance with any one of claims 9 to 12, wherein the mode
switch element is located on the outside of the oral irrigator with a distance of
at least about 6 cm from the closest of the first switch element and the second switch
element
14. The oral irrigator in accordance with any one of claims 1 to 12, further comprising
a control unit that is connected with at least the first switch element, the second
switch element and the drive.